Effects of nitrogen addition and seasonal changes on moss biocrust soil fungal communities in a temperate desert

IF 3.7 2区农林科学 Q1 ECOLOGY

European Journal of Soil Biology Pub Date : 2024-12-07 DOI:10.1016/j.ejsobi.2024.103703

Tingwen Huang , Xi-En Long , Weiguo Liu

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Abstract

Many studies have reported that changes in nitrogen (N) deposition affect the structure and diversity of fungal communities in moss crust soils, but few studies have addressed the seasonal patterns of soil fungal community response to N inputs in desert habitats. Therefore, we conducted a one-time field N addition experiment in March 2017 in the Gurbantünggüt Desert, northwestern China. Four N addition rates, 0 (CK), 1.8 (LN), 3.6 (MN), and 7.2 (HN) g N m⁻² yr⁻¹, were applied, and soil was sampled at different seasons. We found that the effects of N addition on soil fungal communities varied with season, with stronger effects in November and March compared to May. Seasonal variation strongly affected fungal community structure, composition, and function, with the highest diversity index in May. The impact of N addition on fungal communities is attributed to changes in soil pH, total phosphorus, and available phosphorus, while the effect of season on fungal communities is driven by changes in temperature, soil moisture and soil organic carbon. Additionally, season has a greater effect on fungal communities than N addition. Overall, the fungal communities in soils underlying moss crusts responded strongly to seasonal variation, but their response to N addition was seasonally dependent.

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加氮和季节变化对温带荒漠苔藓生物结皮土壤真菌群落的影响

许多研究报道了氮沉降变化对苔藓结皮土壤真菌群落结构和多样性的影响，但很少有研究涉及荒漠生境土壤真菌群落对氮输入响应的季节模式。因此，我们于2017年3月在中国西北部古尔班塔 ngg沙漠进行了一次田间施氮试验。施氮量分别为0 （CK）、1.8 （LN）、3.6 （MN）和7.2 (HN) g N m−2 yr−1，并在不同季节取样。结果表明，施氮对土壤真菌群落的影响随季节而变化，11月和3月的影响较5月强。季节变化对真菌群落结构、组成和功能影响较大，5月份多样性指数最高。氮添加对真菌群落的影响主要由土壤pH、全磷和速效磷的变化引起，而季节对真菌群落的影响主要由温度、土壤水分和土壤有机碳的变化引起。此外，季节对真菌群落的影响大于N添加量。总体而言，苔藓结壳下土壤真菌群落对季节变化有较强的响应，但对N添加的响应具有季节依赖性。

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来源期刊

European Journal of Soil Biology 环境科学-生态学

CiteScore

6.90

自引率

0.00%

发文量

审稿时长

27 days

期刊介绍： The European Journal of Soil Biology covers all aspects of soil biology which deal with microbial and faunal ecology and activity in soils, as well as natural ecosystems or biomes connected to ecological interests: biodiversity, biological conservation, adaptation, impact of global changes on soil biodiversity and ecosystem functioning and effects and fate of pollutants as influenced by soil organisms. Different levels in ecosystem structure are taken into account: individuals, populations, communities and ecosystems themselves. At each level, different disciplinary approaches are welcomed: molecular biology, genetics, ecophysiology, ecology, biogeography and landscape ecology.